Walter m



(No Model.)

W. M. JACKSON.

Lamp.

Patented May 10,

iNvENToR WITNESSES N. PETERS, FhoO-Lkhagrapher. Washington. D. C.

NTTED STATES PATENT OEEICE.

WALTER M. JACKSON, OF PROVIDENCE, RHODE ISLAND.

LAMP.

SPECIFICATION forming part of Letters Patent No. 241,140, dated May 10, 1881.

Application tiled September' 28, 1880. (No model.)

To all whom it may concern:

Be it known that I, WALTER M. JACKSON, of the city and county of Providence and State of Rhode Island, have invented a new and useful Improvement in Lamps; and I hereby de-A clare that the following is a full, clear, and exact description ofthe same, reference being had to the accompanying drawings,forming partof this specification.

This invention has reference to an improvemeut in lamps for burning coal and other oils, and is also applicable to oil-stoves.

rBhe object ot' this invention is to prevent the explosion of coal-oil or other-light oil in lamps, and thus avoid the danger now incident to the use of coal-oil lamps.

The invention consists in certain details of construction and arraugemen ts ofparts, as will hereinafter be described, and pointed out in the claim.

Figure l is a view of the improved safety wick-tube, the burner, and the exterior adjustable sleeve, shown partly in view and partly in section. Fig. 2 is a view, partlyin section, of the safety wick-tube and sleeve.

When coal-oil or other light volatile oil is burned in a lamp the heat generated at the burner and conducted downward volatilizes some of the oil and generates hydrocarbon gas, which, when mixed with atmospheric air, forms an explosive mixture which is liable to become ignited and shatter the lamp, spreading` the oil over a large surface, endangering life and property.

To prevent the entrance of air to the reservoir, and the tiame of an explosion, when it does take place, from reaching the oil in the reservoir, I place a safety wick-tube on the burner so as to extend downward toward the bottom ofthe reservoir, and surround this safety wicktube at its lower part with a sleeve closed at the bottom and loosely fitting the wick-tube. I provide the safety wick-tube with annular or spiral grooves, and either make the sleeve to fit the safety wick-tube suficien tl y close to hold oil by capillary attraction and thus form a seal, or I place wicking or other similar material in the grooves, which will hold the oil so as to make a liquid seal.

d is the outer sleeve, closed at e, but provided with one or more small holes, e. The sleeve d may be made of any desired length, and the safety wick-tube may be shorter than the depth of the reservoir, and the two can be readily adjusted to the depth ofthe same by inserting the safety wick-tube partially into the sleeve d and then inserting the whole into the reservoir. Vhen the slee ve l reaches the bottom the safety wick-tube can be pushed into the same, and these tubes made to serve forlam ps or oil-stoves of varying dimensions.

E represents the reservoir.

f represen ts the high level of the oil, and f2 the lower level. When the oil is atf the separation ofthe oil in the reservoir and the wick is complete, and no air can enter the reservoir through the burner; but the oil will reach the Wick both through the annular space between the safety wick-tube and the sleeve and through the small holes c; and when the oil is atf2 the wick is supplied through the holes e only; but the oil is held by capillary attraction between the safety wick'tube and sleeve, and may be assisted by the packing laid in the grooves. In either case, ifthetlame, from any cause, should ignite the gas in the safety wick-tube it cannot communicate with the oil in the reservoir, and as this small quantity of gas has a free outlet at the burner no explosion can be produced that will injure the lamp. The lamp is therefore7 in the true sense, non-explosive. The oil will remain clearer and burn uniformly, as no air is presented to the same, and it is not liable to oxidize.

Having thus described my invention, I cla-im as new and desire to secure by Letters Patent- The combination, with the reservoir F, of the burner a, the wickb, wick-tube c, provided with the grooves c or c2, and the sleeve d, provided with the hole or holes c', as described.

XVALTER MARSH JACKSON.

Vitnesses SIMON S. LAPHAM, J. T. BLoDcrE'rT'. 

